基于Fluent的甲苯蓄热燃烧过程的数值模拟

Numerical simulation of regenerative combustion process of toluene based on Fluent

利用Fluent软件对甲苯在蜂窝陶瓷蓄热体中的蓄热燃烧过程进行数值模拟研究,确定模拟计算所需的网格精度,并计算分析蓄热体孔道直径、燃烧温度、甲苯入口浓度、入口流速对甲苯转化率的影响。结果表明,在较高入口流速条件下,蓄热体孔道直径对甲苯转化率影响较大。随着燃烧温度的升高、甲苯入口浓度和入口流速的降低,甲苯转化率会增大。当燃烧温度为1 050 K时,在一定入口流速范围内(0.07～0.14 m/s)和甲苯入口浓度范围内(2 000～4 000 mg/m3),甲苯转化率均可以达到100%。

The Fluent software is employed to simulate the regenerative combustion process of toluene in honeycomb ceramic regenerator.The grid accuracy which is required by simulation has been determined thereafter the conversion ratio of toluene has been analyzed through investigating the effect of regenerator channel diameter,combustion temperature,inlet toluene concentration and inlet toluene velocity.The results showed that at high inlet velocity,the diameter of regenerator channel had a significant effect on toluene conversion.Meanwhile,it had been found that toluene conversion rate could also be promoted by increasing the combustion temperature,or by decreasing the inlet toluene velocity as well as the inlet toluene concentration.When the combustion temperature was fixed at 1 050 K,the toluene conversion rate could be enhanced to 100%,within a certain range of inlet toluene velocity（0.07～0.14 m/s） and inlet toluene concentration（2 000～4 000 mg/m3）.